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Efke 25 as Sheet Film!

Just wanted to share the information that Efke 25 is available as sheet film, so ld under the name Wephota NP 15. It can be bought in all sizes, and if you have an odd size camera they will cut the film for you!

http://banse-grohmann.de/wephota/sortimix.htm

Efke 25 is the old Adox KB/R 14 film that was born in 1949. It's as sharp and fi ne grained as Ilford Pan F Plus! :-)

Efke 25 as Sheet Film!

Bill,

Sorry, I can't tell much about the reciprocity characteristics, but this I found: I have to set my meter at about ISO64-ISO80 to get decent negatives. So it appears to be more faster film than I first thought.

Just a couple of weeks ago I took some pictures at the studio and exposed the film as ISO64 using the strobes. The negs came out fine. (I used the Rodinal 1+50 20C 5mins constant agitation).

The film's tonal characteristics are somehow odd, but I really like the old-fashioned look of the NP15:

Efke 25 as Sheet Film!

"The film's tonal characteristics are somehow odd, but I really like the old-fashioned look of the NP15".

This film is orthopanchromatic, and less sensitive to red and more sensitive to blue-green than other pan-films. It is designed that way deliberatly, and it has nothing to do with "they didn't know so much back when the film was formulated". There are a couple of standards for b/w films sensitivity to colors:

Orthopanchromatic - Sensitive to all colors but little less to red than blue-green. Yellow filter is standard for dayligt photography, but no filter is needed in lamp light. (For example Efke 25 and 50, Macophot OP100)

Panchromatic - sensitive to all colors, but there can be a little difference between films. (Most b/w films, but Agfa APX 100 is on the border to orthopan films since it's a little more blue senstitive) A light yellow or a yellow-green filter are standard filters for these films.

Ultrapanchromatic - more sensitive to red and less to blue-green. (For example Technical Pan) A light blue-green or a light blue filter is needed to get a more normal conversion of colors to gray scale.

Adox low speed films (now Efke or in this case NP15) were very popular for portraits because of the nice skin tones. The orthopan emulsion automaticly compensated for the yellow-red lamplight in studios. Adox 21 (Efke KB/R100) was formulated as an ordinary Pan- film, and has a thicker emulsion and not meant to be a super fine grained film as the 25 and 50 speed films.